Said NKOTB member Donnie Wahlberg before Ice made his appearance: "Ya'll wanna have a little more fun? Take the lights down low. Chi-town, give it up for Vanilla Ice!"

The rapper sang his massive 1990 hit "Ice Ice Baby" with some assist from the members of NKOTB and then segued into his hit cover/interpretation of "Play That Funky Music."

Ice -- aka Robert Van Winkle -- currently hosts a DIY Network home-improvement show titled The Vanilla Ice Project. During his appearance at the concert, he touted the new season, which debuts in October.